Wrench



Jan. 22, 1924. I 1,481,767

W. H. WIEGERT WRENCH Filed June 19. 1922 FIIIIIHIIIII llllllll ATTORNEY atented Jan. 22, 1924.

UNITED STATES WILLIAM H. W'IEGERT, O F KINGSTON, NEW YORK.

WRENCH.

Application filed JunelB, 1922. Serial No. 569,193.

1 (all in); 0 m it may concern Be it known that I, WILLIAM H. l Vmcmrr,

Kingston, in the county of Ulster and State of New York, have invented new and useful Improvements in renches, of which the following is a specification.

This invention relates to Wrenches. More particularly the invention relates to the type of wrenches such as are used on pipes and commonly known as a Stillson wrench.

Some of the objects of the present invention are: to embody in a wrench features which render the wrench'practical, efiicient and effectual to employ frictionallycontrolled locking yokeflwhich'facilitates the manipulation of the movable jaw of the wrench; to employ a jaw which is yieldable within certain limits, the said jaw being also adjustable relatively to its companion jaw; and with these and other objects in view the invention .residesin the particular provision, construction and operation of parts hereinafter fully described and illustrated in the accompanying drawing, in

which: i l p 1 Figure 1 is a side elevation of the wrench of the present invention.

Figure 2 is aview of the back of the wrench. Y a

Figure 3 is a sectional view taken-on the line 8-3, Figure 2. V

Figure 4 is across section taken on the line 4- .1, Figure 1.

Figures 0, 6 and 7 are perspective views of parts of the wrench detached.

Referring now more particularly to the several views of the drawing, it will be apparent that, the wrench of the present invention will include essentially a pair of serrated jaws a jaw 10 and a jaw 11. The jaw 10 is at the end of a handle 12. The jaw 11 has formed therewith a shank 13. The shank 13 is provided with a rib 14 on each side face thereof; the backedge has teeth or serrations 1.5; and a pin 16 extends through the shank with portions thereof disposed on opposite sides. A guide 17 is employed for effecting the connection of the jaw 11 and its shank, so that the jaw 11 may be moved relatively to the jaw 10. The guide 17 may be in the nature of a casting or the same may be constituted of parts. As constructed the guide 17 comprises plates 18, 18, which are held in spaced relation by a part 19 and a part 20. The insides of the plates 18, 18 each have a groove or way 21 therein.- The plates 18, 18 are extended beyond the part 19 to form spaced ears 22 each of which has a hole therein. The jaw 10 is considerably thicker than the handle 12, and at the juncture of the aw l0 and the handle, recesses are formed which accom-' modate the ears 22. A pivot pin 23 is disposed in alined holes in portions of the jaw 10, and in the. holes in the ears 22,'thus making for the pivotal connection of the guide 17. A spring 24 acts against the part 19 of the guide 17. One end of the spring- 24- is attached to the back edge of the handle, while the free end of the spring is in engagement withthe said part 19. The jaw 11 and its shank are carried by the guide 17 i the shank being arranged for sliding movement with respect thereto by virtue of the ribs it which move in the grooves 21. The

pin 16 prevents the complete withdrawal of the shank from the guide 17. In order that the jaw 11 may be held in difit'erent positions of adjustment with respect to the jaw 10, a member 25 having teeth or serrations 26, is employed so that its serrations 26 may be held in engagement with the serrations l5 of the shank, and so that the serrations 26 may be moved out ofengagement with the serrations 15. One end of the member is disposed between the plates 18, 18, and a 'is pivotally connected to the free end of tlie'member 25, as at 29. The yoke 28 is formed with projectionengaging-members 30, 30, and a manipulator 31. The free end of the member 25 has a stop-lug 32 against which the manipulator 31 moves. The plates 18, 18 are formed with projections 33, 38, which are engaged by the members 30, 30, A flexible member 3 1 is attached to the yoke 28, and the free end of the member 341 bears against the member 25 and sets up frictional contact therewith. hen the members 30, 30 are in engagement with the projections 33, 33, the serrations 26 of the member 25 are in engagement with the serrations 15 of the shank 12, and by virtue of the stop-lug 32 being confronted by the manipulator 31, and the frictional Contact of the shank in the opposite direction.

the member 34 with the member 25, the latter and therefore the shank 13 and itsjaw 11 will be held against longitudinal. movement. \Vhe'n the yoke 28 is moved to disengage the members 30, 30 from the projections 33, 33, the frictional contact of the member 3-1 with the member 25-will hold the yoke in such a position that the member 25 may be moved to disengage the serrations 26 from the serrations 15 with the result that the shank may be moved freely in its guide to the de sired V adji'istment. shank 13 at or near its jaw is at times confronted by the jaw 1 0 thus limiting the pivotal movement of'th'e shank in one direction; whereas, the end of the shank having the Pill-116 is attimes confronted by the handle '12 thus limiting the pivotal movement of It should now be manifest that thejaw 11 is yielldabl'e after adjustment has been made until the end of the shank encounters the handle; and "that the strain is passed, to the greatest eXtei'It, to the handle when the Wrench is in use. I r

virtue of the several features enibodied by the wrench of the present invenfion, approximate adjustments of the mova'bl'e jaw may be made relatively to the fixed jaw, whereupon, by applying the jaws to a pipe or the like to be turned, the movable jaw will yield within certain limits when a final and 'e ilective grip will be had. In making new approximate adjustments the locking yoke may be readily manipulated to be held in positions to which it is moved so that the shank is either held against movement or to be moved freely with one hand while thefother hand of the operator holds the wrench in its entirety.

1. A wrench including a pair of serrated jaws one of which has a shank and is mov The front edge of the able relatively to the other jaw, means for holding and releasing said movable jaw, said means comprising a *pivota'lly mounted guide in which the shank moves, a member having serrations pivotally connected to said guide, serrations on said shank, the serrations of said member being engageable with the serrations of said shank, and a frictionally controlled yoke pivoted to said member for holding the serrations of said member in engagement with the serrations of said shank and allowing their disengage ment.

2. A wrench including a pair of serrated jaws one of which has a shank and is mov able relatively to the other jaw, means for holding and releasing said movable jaw, said means comprising a pivotally mounted guide having projections, the said shank being movable in said guide, a member having serrations ,pivotally connected to said guide, serrations on said shank, the serrations-0t said member being engageable with the serrations of said shank, and a frictionally controlled yoke pivoted to said memher, the said yoke having pr0jection-engag.- ing-members engageable with and disengageable from the projections of said guide.

3. A wrench comprising a pair of jaws, a handle which carries one of said jaws, a spring actuated guide pivotally connected to said handle, the said guide having ways,

one of said ijaws having a serrated shank,

ribs on said shank, the-shank being movable in said guide and its ribs in said Ways, a serrated member pivotal'ly connected to said guide and engageable with said shank, and a frictionally controlled yoke pivoted to said serrated member and engageable with said guide. r

In testimony whereof I hereby afiix my signature. v WILLIAM H. VVIEGERT. 

